So sorry about your son. That sure is a whole lot to have happen to you both.
People who are new to this have a tendency to want to look at a timeline of how long it may be that their spouse is in crisis. The truth is that it takes as long as it takes.
But it is true that by the time the spouse says he wants out, he already checked out sometime ago.
I am sorry he chose not to listen to the doc but here's the thing. While you can be concerned because you care, he is an adult. So, you have to let him make his own decisions. That is part of detaching. Nothing you can do about it, nor should you.
It is hard to let go. It takes time and constant reminding. But it is what you need to do.
He has to figure this out on his own. You cant help him do it. In fact, you shouldnt. He has to look within and fix what's wrong. You need to let him.
Tell us about you, T. Who are you? Who would you like to be? What was your childhood like? What are some things you always wanted to try?